Anti-Human HLA-DR (MHC Class II) - DyLight 488

Antibody Details

Product Details

Reactivity Species

Baboon

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Chimpanzee

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Cynomolgus Monkey

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Marmoset

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Rhesus Monkey

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Squirrel Monkey

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Canine

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Human

Host Species

Mouse

Immunogen

Purified Recombinant Human HLA-DR Monomorphic (> 98%)

Product Concentration

0.2 mg/ml

Formulation

This DyLight® 488 conjugate is formulated in 0.01 M phosphate buffered saline (150 mM NaCl) PBS pH 7.4, 1% BSA and 0.09% sodium azide as a preservative.

Storage and Handling

This DyLight^® 488 conjugate is stable when stored at 2-8°C. Do not freeze.

Country of Origin

USA

Shipping

Next Day 2-8°C

Excitation Laser

Blue Laser (493 nm)

RRID

AB_2893703

Applications and Recommended Usage?
Quality Tested by Leinco

FC The suggested concentration for this HLA-DR (Clone L243) antibody for staining cells in flow cytometry is ≤ 1.0 μg per 10⁶ cells in a volume of 100 μl or 100μl of whole blood. Titration of the reagent is recommended for optimal performance for each application.

Each investigator should determine their own optimal working dilution for specific applications. See directions on lot specific datasheets, as information may periodically change.

Description

Specificity

Clone L243 recognizes a conformational epitope on the human MHC class II molecule HLA-DRα, which depends on the correct folding of the αβ heterodimer1. It does not cross-react with HLA-DP or HLA-DQ.

Antigen Distribution

HLA-DR is expressed on antigen-presenting cells, including macrophages, monocytes, DCs, and B cells, and activated T cells.

Background

HLA-DR antibody, clone L243, recognizes the major histocompatibility complex (MHC) class II molecule Human Leukocyte Antigen - DR isotype (HLA-DR). MHC class II is constitutively expressed on human professional antigen-presenting cells (APCs), including macrophages/monocytes, dendritic cells (DCs), and B cells, and is induced on T cells upon activation². HLA-DR consists of two transmembrane proteins, a 35 kDa α (heavy) chain and 29 kDa β (light) chain³ encoded by the HLA-DRA and HLA-DRB1, HLA-DRB3, HLA-DRB4, and HLA-DRB5 genes, respectively, located in the HLA complex of chromosome 6. The N-terminal α1 and β1 domains form the antigen-binding groove, which binds 13-25 aa peptides derived from exogenous antigens⁴. On APCs, MHC class II plays a critical role in the adaptive immune response by presenting phagocytosed antigens to helper CD4 T cells. The T cell receptor (TCR)/CD3 complex of CD4 T cells interacts with peptide-MHC class II, which induces CD4 T cell activation leading to the coordination and regulation of other effector cells. CD4 molecules also bind to MHC class II, which helps augment TCR signaling⁵. It has also been demonstrated that MHC class II express on activated T cells are capable of antigen presentation⁶ and can transduce signals into T cells, enhancing T cell proliferation and activity⁷. HLA-DR expression is a marker of T cell activation and correlates with disease activity in patients with autoimmune disease⁸ and rapid progression in HIV infection⁹. Specific alleles of HLA-DR are associated with autoimmune diseases, including rheumatoid arthritis¹⁰.

Antigen Details

Protein

HLA-DR Monomorphic

Ligand/Receptor

CD3/TCR, CD4

Function

Peptide presentation

PubMed

HLA-DR Monomorphic

NCBI Gene Bank ID

3122

Research Area

Immunology

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Innate Immunity

References & Citations

1. Moro M, Cecconi V, Martinoli C, et al. (2005) BMC Immunol. 6:24

2. Holling TM, et al. (2004) Hum Immunol. 65(4):282-90

3. Mitaksov V, (2006) J Biol Chem. 281(15):10618-25

4. Wieczorek M, et al. (2017) Front Immunol. 8:292

5. Artyomov MN, et al. (2010) Proc Natl Acad Sci USA. 107(39):16916-16921

6. Barnaba V, et al. (1994) Eur J Immunol. 24(1):71-5

7. Di Rosa F, et al. (1993) Hum Immunol. 38(4):251-60

8. Viallard JF, et al. (2001) Clin Exp Immunol. 125(3):485-491

9. Langford SE, Ananworanich J, Cooper DA. (2007) AIDS Res Ther. 2007; 4:11

10. Gough SC, Simmonds MJ. (2007) Curr Genomics. 8(7):453-465

Technical Protocols